Improved apparatus for distilling spirits of turpentine



0. CASHWELL.

Turpiantine Still.

Patented Nov.- 19, 186.7.

o o o 0 O 0 0 0 0 Witnesses= lnventc mv I AM. PHOT0-LlTHO.C0.N.Y. (OSBORNE'S PROCESS.)-

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DAVID GASHWELL, 0F FAYETTEVILLE, NORTH CAROLINA.

Letters Patent No. 70,956, dated November 19, 1867.

IMPROVED APPARATUS FOR DISTILLING SPIRITS 0F TURPENTINE.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, DAVID CASHWELL, of Fayettevillc, in the county of Cumberland, and State 'of North Carolina, have invented a new and useful Improvement in Apparatus for Distilling Spirits of Turpentine; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had tow the accompanying drawings, forming part of this specification. i

Figure 1 represents a still, with my improvements for distilling by steam attached.

Figure 2 a section of the still, taken in the line :v-x, fig. 1.

Similar letters of reference indicate corresponding parts.

This invention relates to an improvement in distilling spirits of turpentine, and consists in an apparatus,

for applying steam to cxtract and expel the spirits of turpentine and rosin from crude turpentine and pine wood, constructed as hereinafter described.

A represents a still, built of wood or iron, and of any desired size and form. B is a worm, connected by a cap pipe, 0, as usual, and to be employed in the ordinary manner for condensing the vapor passing over from the still. D represents a steam-generator, from which the pipe a leads directly into the lower part ,of the still A. b b are pipes also leading from the steam-boiler into the still, and formed into horizontal coils b 6 within it, leading out at the opposite side, where the ends are provided with stop-cocks. The pipes a 6 are also provided with stop-cocks outside of the steam-boiler. Above the coils b b are fixed, in the still, two horizontal diaphragms or screens, of wire cloth, or perforated metal plates 0 c, the upper one coarser than the lower, and supported centrally by a standard, at. A pipe, 0, leads out of the bottom of the still, and is provided with a stop-cock, or a stopper of any kind.

The operation is as follows: The still is charged with crude turpentine, or short pieces of pine wood, contaiuing rosin, when, being all closed, ajet of steam is admitted through the pipea into the still, and steam is also admitted in the coils b b. The contents of the still are thus acted upon by the steam directly, and the heat radiated from the'coils until thespirits of turpentine contained therein is separated from the rosin, and in a volatile or gaseous form passes of through the cap pipe 0' to the worm B, to be condensed in the usual way,

while the resinous matter melts and drops down through the diaphragms c c to the bottom of the still, to be drawn oil" from time to time through the pipe e. When the steam condenses in the coils b b, it is discharged by opening the stop-cocks at the outer ends. One of the diaphragms, 0, may be dispensed with, but I prefer the employment of two, with the lower one very finely perforated to catch small fragments of wood that may pass through the upper screen, that supports the material operated on.

The advantages of this mode of distilling spirits of turpentine over the common method of applying the heat directly by fire under a metal still, consists in economy of fuel, increase of production, and great snperi ority in the products, especially in the quality of the rosin, which is made very fine and clear, instead of being burned and of a dark color.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The application of steamfio the distillation of spirits of turpentine, as herein described.

2. The induction-steam pipe at, the steam-heating coils b b, and the diaphragms c a, combined with the still A, the steam-generator D, and the worm B, arranged and operating substantially as and for the purposes shown and described.

DAVID OASHWELL.

Witnesses:

WM. F. MCNAMARA, ALEX- F. Roeaa'rs. 

